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Finding the Fourth Proportional to 2,746.50, 4,118.64 and 991.18

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Solution

The fourth proportional to 2,746.50, 4,118.64 and 991.18 is: 1,486.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,746.50 : 4,118.64 = 991.18 : x
  2. Step 2: Convert to fraction form
    2,746.50/4,118.64 = 991.18/x
  3. Step 3: Cross multiply
    2,746.50x = 4,118.64 × 991.18
  4. Step 4: Simplify right side
    2,746.50x = 4,082,313.60
  5. Step 5: Solve for x
    x = 4,082,313.60/2,746.50
  6. Step 6: Final answer
    x = 1,486.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.